Hydrographic chronograph.



'G.'E. LAWRENCE'.

HYDROGRAPHIU CHRONOGRAPH.

APPLICATION FILED FBBLze, 1909.

1,054,849, Patented Mar.4, 1913.

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FIG.

INT0/UVEK OLUMBM PLANOGRAPM p0.. lAs-MINGTON, D. c.

G. E. LAWRENCE.

HYDROGRAPHIU CHRONOGRAPH. APPLICATION FILED FEB.26, 1909.

22 SHEETS-SHEET 2.

Patented Mar.4,1913.

UNITED sTATEs PATENT oEEioE.

GEORGE E. LAWRENCE, y01?' PHILADELliI-IIA, PENNSYLVANIA, ASSIGNOR, BYkIVIESNE ASSIGNMENTS, TO BARRETT & LAWRENCE, INCORPORATED, A CORPORATIONOF PENNSYLVANIA.

HYDROGRAPI-IIC CHRONOGRAPH.

- Patented Mar. 4,1913.

Serial No. 480,183.

To all whom t may concern:

Be it known that I, GEORGE E. LAWRENCE, a citizen of the United States,and a resident/,of Philadelphia, inthe county of Philadelphia and Stateof Pennsylvania, have invented a new and useful HydrographicChronograph, of'whic'h the following is a specification.

The principal object of the present invention is to provide a simple,reliable, accurate and comparatively inexpensive instrument forautomatically recording the rise and fall of water in rivers, lakes,ponds, streams, oceans and the like during appropriate intervals oftime, which may be months or other convenient intervals.

An instrument embodyingthe invention is capable of varied embodimentsand will be claimed at the end hereof, but a description will first begiven of the embodiment of the instrument chosen for explanation inconnection with the accompanying drawings, in which Figure 1, is a viewillustrating the instrument arranged for recording the rise and fall ofwaters in rivers. Fig. 2, is a front view, partly in section drawn to anenlarged scale, and illustrating an instrument embodying features of theinvention, and Fig. 3, is a side view partly in section.

In the drawings, 1 is a driving wheel mounted upon a spindle 2,revoluble in suitable bearings 8. The wheel 1 is shown as a sprocketwheel and the bearings are shown as standards. Over the wheel 1 passes asuitable connection, in the present instances, the sprocket chain 4. Toone end of this chain 4 is connected a float 5 and to the other end ofthis chain is connected a counter-weight 6. The float 5 kmay comprise ahollow metal body or may be Otherwise constructed. Tubes 7 and 8 operateas guides for the float and counter-weight respectively and they may besupported in any convenient manner. As shown they are illustrated assupported by the structure of the wharf or pier 9.

' The parts 1, 2, and 3, arey shown as varranged within a suitablehousing or box 10, into which the chain 4 extends. In the example chosenfor illustration, the pipesy or tubes 7 and 8 extend throughthe floor ofthis housing 10. The stream or river is assumed to flow from left toright in Fig. 1 and the down-stream side of the pipe 7,

be filled with glycerin or other substance,`

that does vnot freeze easily and which,'when present, insures theaccurate operation of the float, even though the river may freeze andthaw. As the water level changes for example between the low level b-Z;and the flood level 0 0, or even beyond those levels, the float andcounter-weight in cooperation acting upon the chain, turn the spindle 2in one direction or the other.

12, is a carrier for recording cards. It is shown to consist of a drumto the periphery of which the cards are applied. The drum is shown asmounted upon a spindle 13, mounted in a frame 14, arranged in thehousing.

15, is a clock bymeans of which the drum is rotated through theintervention of suitable gearing as 16. The clock is arranged to rotatethe drum, for example, once in a or more accurately, the submergedport-ion l month and the clock may be made to operate during that timewithout attention, so that an attendant may visit the plant monthly,take olf a card and replace it by a fresh one and then, if necessary,wind the clock. is chosen merely for description.

There is a nut 17 mounted upon a screw 18, revolubly supported by theframe 14. This nut is held against rotation by permitting it to slide onrods 19. vThe nut carries a stylus arm 20 provided with a stylus whichis held up to the paper on the surface of the drum by means of a spring21.

22, is a receptacle which may be provided forV a supply of ink which isdelivered to the s-tylus.

The screw 18 is driven by the spindle 2,

Aas shown through the intervention of bevel Vof these joints is topermit theA apparatus to work properly even though some of its parts maybe somewhat out of line or otherwise disarranged. ,Y T

The screw, nut, bevel gears and connections constitute means forreducing the motion which is transmitted by the float and counter-weightto the stylus. The move- Of course the interval of one monthl nient ofthe float inay be very considerable, as it is well known that the levelof soiiie bodies of water is subject to very Wide fluctuations, but themovement of the stylus is coiiil'iaratively small, so that the chartproduced while presenting a coiiiplete record ot' the extent of the riseand fall of the body of water and of the time of the occurrence of suchrise and fall is coinpziratively small.

That I claiin is:

A hydrographic chronograph comprising the combination of a card carryingdruin reivoluble about a vertical axis, a clock for turning the drum, anut carrying a stylus cooperating with the druin, guides for holding`the nut against rotation and for permitting it to travel, a screw forcausing the nut to travel, a freely revoliible driving' sprocket Wheel,bevel wheels and links and universal Connections interposed between thedriving wheel and screw, a connection passing over said sprocket wheeland having at one end a float and at the other end a GEO. E. LAVRENCE.

l/Vitnesses:

CLIFFORD K. CAssiiL, FRANK E. FRENCH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Y Washington, D. C.

